diff --git a/config.ru b/config.ru
index bf54dd0..8c5991f 100644
--- a/config.ru
+++ b/config.ru
@@ -9,6 +9,7 @@ require "react/source"
 
 run Opal::Server.new {|s|
   s.append_path 'app'
+  s.append_path 'lib'
   s.append_path File.dirname(::React::Source.bundled_path_for("react-with-addons.js"))
   s.main = 'debugger'
   s.debug = true
diff --git a/lib/interpreter.rb b/lib/interpreter.rb
new file mode 100644
index 0000000..0543bad
--- /dev/null
+++ b/lib/interpreter.rb
@@ -0,0 +1,10 @@
+
+class Interpreter
+
+  attr_accessor :instruction
+  attr_accessor :registers
+
+  def initialize
+    @registers = (0...12).collect{|i| "r#{i}"}
+  end
+end